At present, in formulated fertilization the balanced fertilization method and soil fertilityindex method are widely utilized at home and abroad.
平衡施肥法和土壤肥力指标法是目前国内外普遍采用的两种测土配方施肥方法。
2
Through field investigation and soil fertilityindex analysis, causes and mechanism of fertility degradation of black soil in the Songliao Plain were explored.
通过田间调查和土壤肥力指标分析，探讨了松辽平原玉米带黑土肥力退化的原因和机理。
3
Results showed that the Integrated FertilityIndex (IFI) of orchard soil in red earth regions of Guangxi were between 0.17 to 0.25 and belong to mid-low level.